Cross-bar shoe for planing-m ach ines



(No Model.)

A. B. BEAN.

CROSS BAR SHOE FOR PLANING MACHINES. No. 316,109, Patented Apr. 21, 1885.

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ALBERT B. BEAN, OF NEW HAVEN, CONNECTICUT.

CRO SS-BAR SHOE; FOR PLANING -MACHINES.

SPECIFICATION forming part of Letters Patent No. 316,109, dated April 21, 1885.

Application filed July 21, 1884. (No model.)

metal-planing machines; and it consists in a novel means of securing the cross-feed screwnut to the cross-bar shoe, as hereinafter more fully described and claimed.

In 'the drawings,'Figure 1 is a side elevation of a planer-head, and Fig. 2 a rear ele vation of the same. Fig. 3 is a view of the cross-bar shoe detached from the head; Fig. 4, a view of the slide. Fig. 5 is a view of the nut-block, and Fig. 6 a view of the nut.

In the construction of planers the cross-feed screw-nut is fastened to the cross-bar shoe after the shoe has been placed upon the crossbar, in which position the rear side of the shoe is difficult ofaccess.

VVith my improved device the nut is easily fitted to or removed from the shoe while the latter is upon the cross-bar.

In the accompanying drawings, A designates a cross-bar shoe to which the cross-feed screw-nut B is secured by means of my improved method. In the rear face of the shoe a dovetailed groove, C, is formed, extending horizontally a little more than half the distance across the shoe. Parallel with the groove, at its outer end, a bolt-hole, d, with a countersink, d, around it, is formed in the side of the shoe for the reception of a screw, 6, and the bolt-hole is sufficiently near the groove to bring a portion of the screw-head over the groove. The nut-block f consists of a short arm with a cylindrical hole, f, horizontally through it, and is formed with a dovetailed base, 5/, to fit the groove C. The dovetailed base is made longer thanthe other part of the block, and projects beyond it, one end forming aflange, h. The nut B is an internally-threaded cylindrical bushing, with a hexagonal flange, j, on one end, and a thin nut, 70, screwed upon the opposite end. The slidel is a dovetailed bar exactly fitting the groove C, and the added lengths of the slide and nut-block are exactly equal to the length of the groove C, so that when both are in place in the groove the end of the slide is coincident with the side of the shoe. A portion of a countersink, m, is cut in the end of the slide for the reception of that portion of the screwhead 6 overlapping the groove and slide.

Constructed as above described and shown. the operation of my device is as follows: After the shoe A is in place upon the cross-bar, the nut-block f is insert-ed in the groove C and pushed to the extremity of the groove. The slide is inserted after the nut-block and pushed close against it. The screw e is then screwed down firmly in the hole d, thus holding the slide and block in place. The nut B is placed in the cylindrical holef in the nutblock, with one side of the hexagonal flangej in contact with the flange h on the nut-block, by which means the nut is prevented from turning in the block. The feed-nut is held in the nut-block by the thin nut 7c,screwed upon the end of the feed-nut. \Vllen the feed-nut is worn out, it can be removed by unscrewing the nut 70, and a new feed-nut be inserted without delay. It is evident that the shape of the groove C need not be dovetailed, but that a T slot or other suitable form of groove would be as effective; but the dovetailed groove is preferable.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a planer cross-bar shoe, a groove, C, for the reception of a nut-block supporting the feed-nut, substantially as described.

2. In a planer-head, a nut-block, f, supporting a feed-nut, and provided with a base, g, fitting a groove in the crossbar shoe, as and for the purpose specified.

3. In a planer-head, the combination of the nut-lolockf with the slide Z,fitted in a groove, C, substantially as described. I

4. In a planer-head, the combination of the feed screw-nut B with the nut-block f, as and for the purpose specified.

5. In a planer-head, the combination of the cross-bar shoe A wit-h the nut'block f, substantially as described.

6. In a planer-head, the combination of the cross-bar shoe A, the nut-block f, nut B, slide Z, and screw 6, substantially in the manner and for the purpose specified.

ALBERT B. BEAN.

Witnesses:

EDWIN 0. Dow, JONATHAN W. POND. 

